Overview

What is Validation Framework?

Validation Framework is a lightweight, flexible, and extensible validation library for .NET applications. It provides a clean and intuitive way to validate various data types with customizable rules and detailed error reporting.

Key Features

Core Capabilities

  • Fluent API: Build validation rules with a clean, chainable syntax
  • Type-Safe: Compile-time type checking prevents runtime errors
  • Detailed Error Reporting: Comprehensive error messages with field-level tracking
  • Extensible: Easy to add custom validators for your specific needs
  • Async Support: Full support for asynchronous validation scenarios

Built-in Validators

The framework includes 70+ built-in validators covering common scenarios:

  • Basic: Email, Phone, URL, Date, Range, etc. (20+)
  • Network: IP Address, Domain, JWT, API Key, International Phone (6)
  • Identifiers: GUID, UUID, SSN, CVV, Credit Card Expiry (5)
  • Files: File Extension, MIME Type, File Path (3)
  • Versioning: Semantic Version (1)
  • Codes: Currency, Language, Country, Postal Code (4)
  • Location: Latitude, Longitude, Coordinates, Time Zone (4)
  • Text: Letters Only, Slug, Color (3)
  • Security: Strong Password (1)

Platform Compatibility

The framework is UI-agnostic and works seamlessly with all major .NET platforms:

  • ASP.NET Core: ModelState integration, action filters
  • WPF: INotifyDataErrorInfo support, validation rules
  • Windows Forms: ErrorProvider integration
  • Blazor: EditContext integration, validatable components
  • .NET MAUI: VisualElement validation, attached properties

Architecture

Core Components

  • Validator - Main validator class
  • ValidationResult - Validation outcome container
  • ValidationRule - Individual validation rule
  • CommonValidators - 20+ built-in validators
  • AsyncValidator - Async validation support
  • AsyncValidationRule - Async validation rule
  • AsyncValidationExtensions - Async helpers

Platform-Specific Integrations

  • ValidationFramework.AspNetCore.cs - ASP.NET Core integration
  • ValidationFramework.Wpf.cs - WPF integration
  • ValidationFramework.WinForms.cs - Windows Forms integration
  • ValidationFramework.Blazor.cs - Blazor integration
  • ValidationFramework.Maui.cs - .NET MAUI integration

Quick Example

using ValidationFramework;

// Create a validator
var emailValidator = CommonValidators.EmailValidator();

// Validate
var result = emailValidator.Validate("john@example.com");

if (result.IsValid)
{
    Console.WriteLine("Email is valid!");
}
else
{
    foreach (var error in result.Errors)
    {
        Console.WriteLine(error);
    }
}

Next Steps